Surface-trimming machine.



"+1.0. HANSEN, mzc'n;

'HQ'A. HANSEN, EXECUTOR.

SURFACE TRIMMING MACHINE. I

APPLICATION men JUNE 11. 1913. PMGIltGd Apr. 17, 1917.

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B. 0. HANSEN, DECD. -H. A. HANSEN, EXECUTOR. SURFACE TRIMM ING MACHINE.

APPLICATION FIL'ED IUNEH. 1913. P t t d A 17 1917 3 SHEETS-SHEET 2.

H. C. HANSEN, DECD. u. AJHANSEN. ExEcumn.

SURFACE TRIMNHNG MACHINE. v

urucmou mm JUNEH. 1913. Patented Apr. 17, 1917.

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NITE sT s PATENT OFFICE.

HANS c. HANSEN, or NEwToN, MASSACHUSETTS; H. ALFRED H SEN xEoUTon 0E SAID HANS o. HANSEN, DECEASED.

SURFACE-TRIMMING MACHINE.

To all whom it may concern I Be it known that I, HANs C. HANsEN, a citizen of the United States, and resident of Newton, county of Middlesex, and State of trimming surfaces and more particularly for trimming parallel surfaces, and is in many respects an improvement upon the machine shown in my prior Patent No. 786,759 granted April 4, 1905, although it involves a number of entirely new features. I

The machine is intended among other uses for trimming parallel and square the edges of blocks of wood or metal, such as electrotype and stereotype blocks and cuts, for trimming newspaper headings and head lines, for trimming slugs, furniture, and all such character of work, made use of by printers, but it is alsoadapted for a wide range of work .of various character whergver it is desired. to trim an edge'or surace.

The machine is devised to perform the trimming operation with great accuracy and to support and adjustthe workand move it with relation to the cutter with great'accuracy. -The machine is also arranged so that when once set for a given piece of work,

other work .of the same character may be trimmed with equal accuracy without further readjustment.

' A feature of th invention involves the provision of means for trimming a flatsurface upon thin strips, and the provision of means for clamping and supporting such thin Strips while being trimmed.

Another feature of. the invention involves means for automatically feeding the Work past the cutter and for automatically returning the work to starting position and releasing it, thus enabling the machine to be operated with great rapidity when'the same operation is to be performedupon a number ofsimilarpieces of work.

The features of the invention above referred to and other features and improvements will appear more fully from'the ac- Specification of Letters Patent.

Patented Apr. 17, 1917.

Application filed June 1 1, 1913. Serial No. 773,059.

companying description and drawings and will be particularly pointed out in the claims.

The drawings represent a preferred form of machine embodying the invention and particularly designed for use in the printers trade.

In the drawings, Figure 1 is a front elevation, partially in'cross section and with thelegs broken away, of a machine embodying the invention;

Fig. 2 is a detail showing in side elevation the cutter head provided with cutters for vbeveling;

Fig. 3 is an elevation of the face of the cutter head and cutters as shown in Fig. 2;

Fig. i is a top plan view of the parts shown inFig. 2; t

Fig. 5 is a side elevation looking toward the center of the machine of one of the movable members of the Work-holding means; 1

Fig. 6 is a' vertical cross section of one of the work rests supporting slides showing one of the movable members of the workholding means in. place;

Fig. 7 is a plan view of the work-holding device when thin work is to be trimmed;

Fig. 8 is a top plan view of the machine; Fig. 9 is a detail of the clamp for one end of thin work;

. Fig. 11 is a central vertical cross section of the machine taken between the work rests and looking toward the right hand side of the machine; I

Fig. 12 is adetail plan view showing the means for connecting-the work rests supporting slidesto the feed screw;

- Fig. 13 is asectional view taken on the line w-w, Fig. 912;

Fig. 1 1 is an end elevation of the releasing hook 'and connected parts shown in Fig. 12.

Inthe general construction of the frame, work-supporting carriage, and cutting mechanism, the machine is Similar to that shown in my prior Patent'No. 786,759, above referred to.

The bed of the machine 1 is supportedat a suitable height by legs or standards 2.

chine are connected by a cross piece 3. and these cross pieces contain the bearings for the main shaft 4.

The bed is provided with parallel guideways 5 and 6 extending from side to side, or transversely of the bed.

Carriages 7 and 8 are mounted to slide upon the guideways 5 and 6 toward and from each other. and this movement is secured by means of a right and left screw 9 threaded into lugs 10 and 11 depending respectively from the carriages 7 and 8. At

one end the screw 9 is journaled as at 12 in the bed 1 against longitudinal movement. and is provided with a suitable operating crank 13.

The carriages 7 and 8. respectively, support cutter spindles 14 and 15 carrying outter heads 16 and 17 and pulleys l8 and 19 by means of which the cutter spindles and cutters are rotated by belts extending to pulleys upon the main shaft 4. The cutter heads are provided on their faces with suitable cutting tools and are thus arranged when set in rotation to trim or cut surfaces in exact parallelism.

The work to be trimmed is carried between the cutter heads upon suitable worksupporting means and for that purpose tracks 20 and 21 are formed on the carriages 7 and 8 respectively. These tracks extend from in front to the rear of the machine. or longitudinally thereof, and in order to enable work of suitable size to be trimmed the carriages are preferably elongated at the front and rear of the machine at the line where the tracks are carried.

The tracks 20 and 21 receive respectively the work rests supporting slides 22 and 23. The parallel and simultaneous movement of these slides is secured by the rods 24 and 25. The rod 25 is rigidly connected to the slide 22 and slides through a hole in the contiguous end of the slide 23, while the rod 24 is rigidly connected to the o posite end of the slide 23 and slides through a hole in the contiguous end of the slide 22.

Suitable work rests 26 and 27. shown as vertically arranged plates attached by screws 28, are mounted respectively upon the slides 22 and 23. For ordinary classes of work the work is supported directly upon the work rests 26 and 27 in horizontal position and is held by suitable work-holding means. herein shown as a pair of fixed members 29 and 30 rigidly secured to the work rests 26 and 27. respectively, and a pair of movable members 31 and 32 carried. respectively, by the slides 22 and 23 in the following manner.

The slide as, for example, the slide 23. is provided with a hole 33 extending throughout its length. A rod 34 is fitted in the hole and a coil spring 35 surrounds the rod and is held compressed between the head 36 of the rod and a shoulder 37. the hole in the forward end being of larger diameter to receive the spring and form the shoulder. At the rear end the hole is similarly enlarged to receive a nut 38 screwed onto the end of the rod and seating against a similar shoulder when the rod is in place and the spring expanded. A slot 39 opens from the hole 33 to the inner surface of the slide 23. The movable member 32 of the work-holding means has attached to its face a gib 40 fitting in a slideway 41 formed longitudinally of the slide 23 parallel with the rod 34. A spring friction clamp 41 surrounds the .rod and projects through the slot 39 into an opening 42 in the member 32. A cam lever 43 is fulcrumed at on the member 32 and engages the friction clamp 41 so that when the lever 43 is in one position. the clamp 41. will be closed upon the rod 34- locking the member 32 thereto. and when it is in the other position the clamp will be released from the rod 34.

Each movable member is mounted in a similar way. and it will thus be seen that when the work is placed in position upon the work rests 26 and 27. abutting against the fixed members 29 and 30. the movable members will clamp the work and hold it firmly against the fixed members. the spring 35 yielding for that purpose and the cam levers 43 enabling the movable members to be fixed at any point along the rod 34. according to the size of the work.

The movement of the slides 22 and 23 with the supported work rests and work past the cutters is secured by an automatic feed and an automatic return. although the slides may be moved manually when desired. One of the slides. as 23. has depending therefrom bearing brackets 45. 46 and 47. in which is rotarily mounted the shaft 48. The bracket 47 is bent forwardly so as to sustain the forward end of the shaft and permit it to extend forward beneath the work rest. The shaft 48 is rotated by a pulley 49 mounted thereon between the brackets 45 and 46 and driven by a belt 50 from a pulley 51 on the main shaft 4. The shaft 48 is threaded throughout its length between its bearings in the brackets 46 and 47. A bracket 52 depends from the same slide 23 and is bent rearwardly at 53 parallel to the shaft 48. The portion 53 of the bracket 52 has mounted therein a shaft 54. This shaft is provided at its forward end with a lever 55 which is held in upright position, as shown in Fig. 14, by a hook 56 carried by a sliding bunter pin 57 mounted on the bracket 52 and normally pressed forward toward the machine by a spring 58. The shaft 54 carries a helical spring 59 which tends normally to turn the shaft to throw the lever 55 away from the position shown in Fig. 14. The forward end of the bracket 53 carries a clamping nut 60, both parts of which are fulcrumed at 61, the forward ends of the clamping nutbeing threaded to engage the threaded portion of the shaft 48, whilethe rearward ends receive between them a fiattened cam like'portion 62 of the shaft 54.

'When'the lever 55 is thrown into the position shown in Fig. 14, the clamping nut 60 engages the shaft 48 and the hook 56 retains the parts in position. The shaft 48 being rotated, the slides carrying the work rests andwork'will be fed forward past the cutters until the hunter pin 57 comes in contact with carriage 8, when the hook 56 will be forced back, releasing the lever 55 and causing the spring 59 toact and open the clamping nut, thus disconnecting the. slides from the screw shaft 48.

The slides carrying the work rest and work are returned in any suitable manner .asbya weight 63 suspended on a cord 64 ting against the sides of the slides 22 and 23. While these are not necessary, in very fine work it isfound that there may be a tendency of the slides 22 and 23 to shift slightly from exact parallelism with the cutters.

The adjustment of the carriages to and from each. other is, as stated, controlled by the shaft 9 and the extent of this adjustinent may be determined by pins 69 and 70,

one of which should'be adjustable, and which are set with theirfaces the same distance apart, at some given position,-as the cutting planes of the cutters are apart.

Hence, the distance between the faces of the pins 69 and 70 will always represent the distance between the cutting planes. The upper face of rod 24 is also graduated and a gage 71 is mounted on the slide 22 to co operate with the graduations, and. the zero point is so arranged that the gage may indicate upon the graduations' thedistance apart of the cutting planes. 7

In the form shown the graduations are in units of 12-point ems with half units of 6-point ems; .The gage 71 is made with three steps, each two points apart, so that by means of the gage and scale the slides maybe spaced apart at any interval of two points or more, but it is obvious thatany desired graduation may be employed.

One of the cutter heads, as l6, is shown enlarged in Figs. 2, 3 and 4. For planing parallel surfaces each cutter head is provided with one or more cutters 72 of the usualv type. Means are also afforded for with the cutting edge 74 formed obliquely to cutting a beveled edge upon the work such, for example, as the edge of an electrotype.

The beveling cutter comprises a slotted shank '7 3 havingthe projecting cutter blade l 75 the axis of rotatlon and locked in place 1n a groove 75 in the face of the cutter head by a set screw 76.

In Fig. 2, the work rest 26 is indicated with a portion of an electrotype 27 in place. It will be seen therefrom that the cutter 74 will in its rotation cut a beveled edge on the plate 27, and the length of this bevel may be varied by adjusting the cutter 74 radially in the cutter head.

A age77 is mounted in a hole in the carriage 7 and held in place by a set screw '78. This gage servesto fix the position of the edge of the material to be cut with respect to the cutters and can be set so that the same amount of material will be trimmed off each time. Another gage 79 is shown mounted in the carriage 7 adjacent to the gage 77. This gage 79 is held in place by a set screw 80 and is hinged at'its forward end. It is intended to be used for alining work such as an. electrotype by means of the matter appearing upon the face of theplate.

allowing the slides carrying the work rest to come forward under the action of the weight 63 into the position shown in Fig. 8. .105

Thecarriages 7 and 8 are then adjusted toward and fromeach other by operating the handle 13 until the cutting planes are the desired distance apart. This may be determined by measuring the distance between the pins 69 and 7 0, or by reading the graduations on the rod 24 asindicatedby the gage 71. The slides carrying the work rest are then pushed backwardly and the movable members 31 and 32 of the work-holding means clamped upon the rods 34 by the operation of the levers 43 so that the movable'members and the fixed members will be distant from each other slightly less than the length of the plate. On releasing the slides they will again move forward under the action of the weight 63 until the movable members 31 and 32 come into contact with the stops 67-. This will cause the movable members 31 and 32 to give slightly through the spring 35, and this give can be increased by pullingforward on the slides carrying the work. rests. The plate is then laid upon the work rests 26 and 27 ,and properly positioned laterally, the gage 77 being set ifdesired. The lever 55 is then thrown up until caught and held by the hook 56. This throws the clamping nut 60 into engagement with the feed screw as which is constantly revolving, being driven from the driving shaft 4. The slides carrying the work rest at once feed back and the work is carried past the cutters and parallel surfaces trimmed thereon. When the work has entirely passed the cutters the hunter pin 57 comes in contact with the carriage 8, releasing the hook 56 and, consequently, through the connections just described, releasing the clamping nut 60 from the feed screw 48. This allows the wei ht 63 to come into action and the carriage is at once returned to its forward position, and with such momentum that when the movable members 31 and 32 of the work-holding means come in contact with the stop (57 the plate is released from the work-holding means and the machine is ready to receive a second plate. Asecond plate is then laid in position. the lever 55 thrown up until caught by the hook 556, and the operation is repeated, thus enabling the machine to trim speedily, accurately and rapidly a number of successive plates.

When it is desired to bevel the edge of the plates the cutter shown in Figs. 2, 3 and l is employed and set in the proper position transversely of the cutter head to secure the desired depth of bevel.

In the case of-comparatively thin work upon which it is desired to trim a flat surface, it is necessary to support the work laterally, and for that purpose the device shown in Figs. 7, 9 and 10 is provided. This consists of a frame comprising a pair of cross bars 81 and 82 and a base plate 83. The cross bars 81 and 82 are apertured at 84 and S5 and these apertures fit over pins 86 and 87 on the slide 22, while the other ends of the cross bars rest and slide upon the slide 23. The base plate 83 is slotted at 88 and supports 89 are adjustably held in place thereon by set screws 90. There may be one or more of these supports 89 as required by the length of the thin work to be cut, their function being to support the back of the thin work.

Auxiliary clamps are provided, one for each of the members 32 and 30 of the workholding means at the right hand side. These auxiliary clamps are shown in Figs. 7 and 9 and comprise a socketed body 91, serrated at the edge 92, and a set screw 93, so that they can be slipped over the member of the work-holding means and locked in place by the set screw.

In the operation of this mechanism, a piece of thin work, such as a heading shown at 94:, is clamped between the auxiliary clamps 91 by operating the machine as already described, and the Carriages 7- and 8 are adjusted by the crank 13 so as to bring the supports 89 up against the back of the thin work, the several supports 89 being further adjusted, if necessary, by means of the set screws 90.

In this manner thin work can be trimmed in the same rapid and eiiicient manner as in the case of the regular work.

Having fully described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a machine of the class described, a rotary cutter, a work rest mounted to move transversely thereof, work-clamping means carried by the work rest and adjustable to varying lengths of work, means for automatically feeding the work rest past the cutter, means for adjustably connecting the work rest to said feeding means whereby the extent of feed may be set to correspond with the length of work, and means for automatically returning the work rest at the conclusion of the feeding movement.

2. In a machine of the class described, a rotary cutter, a work rest mounted to reciprocate transversely thereof, work clamp- 1 ing means carried by the work rest and adjustable to varying lengths of work, means for automatically feeding the work rest past the cutter, means for adjustably connecting the work rest to said feeding means whereby the extent of feed may be set to correspond with the length of work, means for disconnecting the work rest from the feeding means at the conclusion of the feeding movement, and means for automatically returning the work rest.

3. In a machine of the class described, a rotary cutter, a work rest mounted to move transversely thereof, work clamping means carried by the work rest and adjustable to varying lengths of work, a feed screw, means for continuously rotating the said feed screw, means for adjustably connecting the work rest to said feed screw whereby the extent of feeding movement may be set to correspond with the length of work, andwhereby when the connection is effected the work rest will be fed by the screw past the cutter, means for automatically disconnecting the work rest from the feed screw at the conclusion of the feeding movement, and means for automatically returning the work rest.

4. In a machine of the class described, a rotary cutter, a work rest mounted to move transversely thereof, work clamping means carried by the work rest and adjustable to varying lengths of work, a feed screw, means for continuously rotating the said feed screw, means for adjustably connecting the work rest to said feed screw whereby the extent of feeding movement may be set to correspond with the length of work, and whereby when the connection is effected the work rest will be fed by the screw disconnecting the work rest from the feed screw at the conclusion of the feeding movement, means for automatically returning the work rest at the conclusion of the feeding movement, and for thereupon automatically releasing the work clamping means.

5. In a machine-of the class described, a rotary cutter, a work rest mounted to move transversely thereof, work-clamping means carried by the'work rest and adjustable to varying lengths of work, means for automatically feeding the work rest past the cutter, means for adjustably connecting the work rest to said feeding means whereby the extent of feed may be set to correspond with the length of work, and means fq' automatically returning the work rest at the conclusion of the feeding movement, and

for thereupon releasing the Work clamping means.

6. In a machine of the class described, a work rest, a fixed work-holding member carried thereby, a rod carried by and mounted to yield longitudinally of said rest, a movable work-holding member mounted to slide longitudinally of said rest, a clamp connected to said movable member, and means to close it upon said rod at any desired point.

7. In a machine of the class described, a work rest, a fixed work-holding member carried thereby, a rod carried by and mounted to yield longitudinally of said rest, a movable work-holding member mounted to slide longitudinally of said rest, a clamp connected to said movable member, means to close it upon said rod at any desired point, a rotary cutter, means for feeding the work rest past the cutter, 'means for automatically returning the work rest at the conclusion of the feeding movement, and means for arresting the movable work holding member and rod just prior to the conclusion of the return movement of the rest whereby the fixed work holding member and movable work holding member are separated to allow the removal of the work.

8. In a machine of the class described, two carriages, each supporting a rotary cutter, means to adjust said carriages to place the cutters desired distances apart, adjust-- able rests forthe work to be trimmed, workholding means connected to said rests including fixed and movable members, means to adjust said members to receive and clamp the work to be trimmed, means for automatically feeding the work rests past the cutters, means for adjustably connecting the work rests to said feeding means whereby the extent of feed may be set to correspond with the length of work, and means for automatically returning the work rests at the conclusion of the feeding movement.

9. In a machine of the class described, two carriages, each supporting a rotary cutter, means to adjust said carriages to place the cutters desired distances apart, adjustable rests for the work to be trimmed, workholding means connected to said rests including fixed and movable members, means to adjust said members to receive and clamp the work to be trimmed, means for automatically feeding the work rests past the cutters, and means for automatically returning the work rests and for releasing the work-holding means.

10. In a machine of the class described,

a rotary cutter head carrying a cutter, a

clamp the thin work, and means for supporting the back of said work whereby the face of the work may be operated upon by the cutter.

11. In a machine of the class described, a rotary cutter head carrying a cutter, a work rest movable past the cutter head, oppositely disposed clamps carried by said work rest and arranged to abut thin work at its ends and back of its face and thus clamp the thin work, means for supporting the back of said work, and means for relatively adjusting the said back supporting means and work, whereby the face of the work may be operated upon by the cutter.

In testimony whereof, I have signed my I name to this specification, in the presence- Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

